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Originally Posted by Stielow
. I'm using the stock ZL-1cooler (part number 20931169).
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I have this part in my hand.
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The CAD picture is the diff cooler in the Z/28. I used the ZL-1 cooler because it is 30% bigger.
So more OE tech in my hot rod.
Mark
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The Z28 cooler looks bigger in the Chevrolet Performance catalog, looks like it has more plates. Is the ZL1 thicker?
My parts guy couldn't put a number on the fittings and or O rings for this heat exchanger. Do you know them or can you direct me to reliable source?
Thanks in advance.